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node_modules/has-proto/test/index.js

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+'use strict';
+
+var test = require('tape');
+var hasProto = require('../');
+
+test('hasProto', function (t) {
+	var result = hasProto();
+	t.equal(typeof result, 'boolean', 'returns a boolean (' + result + ')');
+
+	var obj = { __proto__: null };
+	if (result) {
+		t.notOk('toString' in obj, 'null object lacks toString');
+	} else {
+		t.ok('toString' in obj, 'without proto, null object has toString');
+		t.equal(obj.__proto__, null); // eslint-disable-line no-proto
+	}
+
+	t.end();
+});